Your best bet at this point is to try eqemulator.org's SMS verification system. Login to eqemulator.org (if you don't know your eqemulator.org account info, you can recover it
here), then click the
SMS Verification link in the left pane.
Conversely, if you've already registered a number at eqemulator.org and you no longer use that number, your best bet is to try project1999.com's SMS verification system. Login to project1999.com (if you don't know your project1999.com account info, you can recover it
here), then click the
SMS Verification link in the left pane.
I believe the eqemulator.org and project1999.com SMS verification systems operate independently and use their own separate databases for storing phone numbers, but they're similar in that they're both one-off systems - there's no way to reset or change the phone number they keep on record once you've registered one.